//package generics;// generics/CheckedList.java
//// (c)2021 MindView LLC: see Copyright.txt
//// We make no guarantees that this code is fit for any purpose.
//// Visit http://OnJava8.com for more book information.
//// Using Collection.checkedList()
//import reflection.pets.*;
//import java.util.*;
//
//public class CheckedList {
//  @SuppressWarnings("unchecked")
//  static void oldStyleMethod(List probablyDogs) {
//    probablyDogs.add(new Cat());
//  }
//  public static void main(String[] args) {
//    List<Dog> dogs1 = new ArrayList<>();
//    oldStyleMethod(dogs1); // Quietly accepts a Cat
//    List<Dog> dogs2 = Collections.checkedList(
//      new ArrayList<>(), Dog.class);
//    try {
//      oldStyleMethod(dogs2); // Throws an exception
//    } catch(Exception e) {
//      System.out.println("Expected: " + e);
//    }
//    // Derived types work fine:
//    List<Pet> pets = Collections.checkedList(
//      new ArrayList<>(), Pet.class);
//    pets.add(new Dog());
//    pets.add(new Cat());
//  }
//}
///* Output:
//Expected: java.lang.ClassCastException: Attempt to
//insert class reflection.pets.Cat element into collection
//with element type class reflection.pets.Dog
//*/
